Invention Grant
- Patent Title: Processes for the removal and recovery of cadmium from wet-process phosphoric acid
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Application No.: US17616375Application Date: 2020-06-03
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Publication No.: US11512367B2Publication Date: 2022-11-29
- Inventor: William W. Berry , Thomas E. Baroody
- Applicant: K-Technologies, Inc.
- Applicant Address: US FL Lakeland
- Assignee: K-Technologies, Inc.
- Current Assignee: K-Technologies, Inc.
- Current Assignee Address: US FL Lakeland
- Agency: Greer, Burns & Crain, Ltd.
- Agent Gregory P. Einhorn
- International Application: PCT/US2020/035927 WO 20200603
- International Announcement: WO2020/247502 WO 20201210
- Main IPC: C22B3/00
- IPC: C22B3/00 ; C01B25/238 ; C02F1/42 ; C02F1/52 ; C22B3/42 ; C02F1/28 ; C02F9/00 ; C02F101/20

Abstract:
In alternative embodiments, provided are methods and processes for the removal of cadmium (Cd) from wet-process phosphoric acid that may contain Cd, including excessive amounts of Cd. The process developed is based on the application of commercially available ion exchange resins with the application of Continuous Ion Exchange (CIX) technology. In alternative embodiments, provided are processes and methods for the recovery and/or the removal of cadmium from wet-process phosphoric acid using a continuous ion exchange approach. In alternative embodiments, use of processes and methods as provided herein allows for the reduction of cadmium metal contaminants with minimal phosphate losses and dilution in order to produce a phosphoric acid that is suitable for the production of fertilizers and phosphoric acid products, such as world-class diammonium phosphate fertilizer (DAP), merchant-grade phosphoric acid, super-phosphoric acid, and other phosphoric acid products.
Public/Granted literature
- US20220325377A1 PROCESSES FOR THE REMOVAL AND RECOVERY OF CADMIUM FROM WET-PROCESS PHOSPHORIC ACID Public/Granted day:2022-10-13
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